%0 Journal Article
%T Metakaolin-Based Geopolymers for Targeted Adsorbents to Heavy Metal Ion Separation
%A Francisco J. L¨®pez
%A Satoshi Sugita
%A Motohiro Tagaya
%A Takaomi Kobayashi
%J Journal of Materials Science and Chemical Engineering
%P 16-27
%@ 2327-6053
%D 2014
%I Scientific Research Publishing
%R 10.4236/msce.2014.27002
%X <p style=\"text-align:justify;\">
	<span style=\"font-size:10.0pt;font-family:&quot;\"><span style=\"font-family:Verdana;\">Geopolymer
adsorbents were prepared from silica and metakaolin in different Al and Si components
and applied for removal of metal ions, Cs</span><sup><span style=\"font-family:Verdana;\">+</span></sup><span style=\"font-family:Verdana;\"> and Pb</span><sup><span style=\"font-family:Verdana;\">2+</span></sup><span style=\"font-family:Verdana;\">, from
other heavy metal ions mixture. The geopolymer was optimized at Si/Al = 2 as
adsorbent, targeting to Cs</span><sup><span style=\"font-family:Verdana;\">+</span></sup><span style=\"font-family:Verdana;\"> and Pb</span><sup><span style=\"font-family:Verdana;\">2+</span></sup><span style=\"font-family:Verdana;\"> separation. The
binding behavior was well fitted to Langmuir model, which proved that the
metakaolin-based geopolymer had multibinding to adsorb ions. The effective
adsorption was also observed independent of NaCl concentration for the Cs</span><sup><span style=\"font-family:Verdana;\">+</span></sup><span style=\"font-family:Verdana;\"> and Pb</span><sup><span style=\"font-family:Verdana;\">2+</span></sup><span style=\"font-family:Verdana;\">. This meant that the ion adsorption of geopolymers occurred
under non-electrostatic mechanism.</span></span>
</p>
%K Geopolymer
%K Metakaolin
%K Silica Fume
%K Metal Ions
%K Adsorption
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47606